Knowing your risk factors for a variety of diseases is a simple first step toward good health. Below are some quick, easy-to-use online health calculators that will give you a basic understanding of your risk for developing certain health conditions.

Estimate your personal risk of developing breast cancer, identify your risk factors, and learn how to improve them.

Compare your actual age to your heart's biological age, calculate your risk of developing cardiovascular disease, and prioritize your most harmful risk factors.

See how well your knee or hip joints are working. Then see if surgery may help you live a better life.

Find out if your weight is impacting your health, and if weight-loss surgery may be an option for you.